The original Graphene paper: "The reported graphene films were made by mechanical exfoliation (repeated peeling) of small mesas of highly-oriented pyrolytic gr

The original Graphene paper: "The reported graphene films were made by mechanical exfoliation (repeated peeling) of small mesas of highly-oriented pyrolytic graphite as described in the supporting online material. This approach was found to be highly reliable and allowed us to prepare FLG films up to 10 μm in size. Thicker films (d ≥ 3nm) were up to a hundred microns across and visible by the naked eye." Electric Field Effect in Atomically Thin Carbon Films (Science, 2004) http://arxiv.org/pdf/cond-mat/0410550.pdf http://arxiv.org/pdf/cond-mat/0410550.pdf